Follow the Money
If an analysis of the most recent list of Google Adsense's highest paying search terms as compiled by CyberWyre is any indication of what the future holds, and where the money is, then I'm guessing it has something to do with mesothelioma. The top two highest paying search terms are "mesothelioma treatment options" at $69.10/click and "mesothelioma risk" at $66.46/click.
Of the top twenty-five highest paying search terms, eighteen contain the word mesothelioma. A number of the most expensive search phrases related to mesothelioma also contain words like "treatment", "doctor", "prognosis", "chemotherapy" and "cure". An unscientific sampling of the results of such searches appears to generate far more links to lawyers than to physicians. Go figure.